4042279840 has 48 divisors (see below), whose sum is σ = 9879203880. Its totient is φ = 1561154560.

The previous prime is 4042279817. The next prime is 4042279853. The reversal of 4042279840 is 489722404.

It can be written as a sum of positive squares in 4 ways, for example, as 1939873936 + 2102405904 = 44044^2 + 45852^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 4042279793 and 4042279802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430951 + ... + 440230.

Almost surely, 2^4042279840 is an apocalyptic number.

4042279840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4042279840 is an abundant number, since it is smaller than the sum of its proper divisors (5836924040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4042279840 is a wasteful number, since it uses less digits than its factorization.

4042279840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871225 (or 871217 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 4042279840 is about 63578.9260683129. The cubic root of 4042279840 is about 1592.9743830955.

The spelling of 4042279840 in words is "four billion, forty-two million, two hundred seventy-nine thousand, eight hundred forty".